Start at Elephant Rocks State Park (7406 MO-21, Belleview; www.mostateparks.com/park/elephant-rocks-state-park). These massive red granite boulders slightly resembling pachyderms will test strategy, long jump, body contortioning and your ability to get down from something you were really excited about climbing. Just remember: what goes up, must come down. Two designated trails include a wheelchair-accessible one. However, half the fun is exploring these big boulders on your own path. Photo by Kelly Glueck.